Close-quarter peen



May 5, 1953 w. P. GOEDE CLOSE-QUARTER PEEN Filed May 17, 1949 WILL IFM R 60505,

Patented May 5, 1953 CLOSE-QUARTER PEEN William P. Goede, Baltimore, Md., assignor to The Glenn L. Martin Company, Middle River, Md, a corporation of Maryland Application May 17, 1949, Serial No. 93,705

4 Claims.

My invention relates to an improved riveting tool and more particularly to a rivet gun peen adapter for driving rivets under close-quarter conditions wherein the rivet is angularly displaced from the axial center line of the riveting gun.

In riveting sheet metal, it is very important that the riveting force be applied axially of the rivet; otherwise, the rivet head may be im" properly or insufficiently formed or the rivet misaligned relative to the rivet holes so as to cause costly reworking or replacement of an assembly. Most of such trouble arises in the driving of rivets located. within a channel member or behind other structural members blocked oiT from an aligned approach. Other hard-to-get-at places are where metal sheets are riveted to relatively narrow separators which allow insufficient headspace for operation of a rivet gun in the usual manner. In these cases, it is practically impossible to apply riveting force axially of the rivet. Various unsuccessful attempts have been made prior to this time to solve this problem either by the use of an offset peen which has proved inefiicient in its delivery of rivet force and has limited application, or by flexible force delivering devices which are extremely costly, inefficient, and usually require special gun equipment for use therewith.

The present invention comprises a rivet gun attachment having a relatively light-weight riveting block pivotally mounted at the end of a bracket arranged as an offset extension adapted for slipped-on mounting over the nose of a conventional pneumatic-type rivet gun so as to effect aligned engagement with an angularly displaced rivet.

It is among the objects of this invention to provide a simple rugged rivet peen for use with a conventional rivet gun for applying rivet force to a rivet under close-quarter conditions and at hard-to-get-at locations.

Another object is to provide a riveting device for use with an air hammer for directing force angularly relative to the center line of said hammer.

A still further object is to provide a device for swiveled mounting on a pneumatic-type rivet gun.

Other objects of this invention will become ap parent from the following description when taken in conjunction with the drawing in which like numerals refer to like parts in different views.

In the drawing:

Figure 1 is a side elevation of the tool of this invention shown in operating position mounted on a conventional rivet gun.

Figure 2 is an end view of the tool taken on line 2-2 of Figure 1.

Figure 3 is a sectional view of the riveting block showing mounting of the balled end of the peen member therein.

Figure 4 is a cross-sectional view of the riveting block taken on line 44 of Figure 3.

Referring in detail to the drawing, Figure 1 illustrates the close-quarter rivet gun peen of this invention mounted on the nose ll] of a conventional air-operated percussion-type rivet gun. The nose M}, or cylindrical housing, of the gun is provided with an axial bore H of conventional proportions adapted to receive the shank [2 of a peen member I? for delivering riveting force outwardly of the gun. The gun end [4 of the peen member i3 is formed with a fiat hammer surface adapted to receive rivet driving force from the gun hammer member l5 positioned inside the gun for reciprocated movement under air pressure. The other or forward end l6 of the peen member 58 is formed with a spherical surface. The depth to which the peen [3 can be inserted in the gun nose It) is governed by the conventional type of collar 11 customarily formed around the outer periphery of a peen shank adapted for insertion in a rivet gun.

The main body of the instant tool is formed as an angular bracket l8 having a portion thereof arranged as an integrally formed collar I9 placed at right angles to the midsection portion 3| and adapted for a loose slide fit around the gun nose iii. In order to provide for free and angular movement of the gun nose H3 within the collar 18, its inner peripheral surface 32 is preferably formed with rounded shoulders as shown in Figures l and 2. The midsection 3! of the bracket is is normally positioned parallel to the axis of the gun with the end opposite from collar [9 being formed as a slotted end 29 normally positioned on a plane with but spaced from the ball-like or spherical surfaced forward end [6 of the peen member it. The slotted end 2!] of the bracket [8 is formed to receive one end 3!! of a riveting memher, or block 22 with said one end of the rivet block being apertured for pivoted mounting about a pin or bolt 2! carried by said slotted bracket end with the opposite end 24 of the block being positioned for engagement with the balled peen member [6. The balled peen member H5 is fitted for socketed engagement within the riveting block .22 at a point spaced from the pivot point 2| in a socket 23 formed in the riveting block as a closed-ended groove. The socket 23 of the riveting block 22 (see Figures 3 and 4) is arranged as a round ended bore, or groove, extending inwardly from the pivoted end 30. The top of the groove is formed as inwardly extending lips El proportioned to secure the balled peen member I6 against upward movement but allow for radial movement relative to the block. Originally the balled end I is insertedinto the groove, or socket 23, from-its open end with the stem'portion of the peen member I3 extending upwardly out of the block 22 between the lips 3i. The block is then mounted in the end as or the bracket is with the socket 23 closed off by the pivot bolt 2!.

In all normal riveting positionsythepeen member I3 is driven against the solid end '24 of the riveting block 22 by the percussion movement of the rivet hammer I5. However, under certain conditions, there is a tendency of the peen member I3 to vibrate and chatter if allowed free play. In those instances where such vibration provesundesirable, I .have found it'desirable to place a coiled spring 25 between the balled peen-end i6 and the pivot bolt 2i so as to hold the balled peen end securely socketed aga nst theblock'end 24 under the urge of said spring.

The bottom of the riveting block 22 is formed with a plane surface or rivet engaging face 26 suitable for riveting engagement with either the shank end of a rivet to form a number two head thereon .as illustrated in :Figure 1 with the fiush'rivetfl inserted 'through a metal sheet 29 and a channel 28 and held in place against the sheet by a bucking bar'33, or for conventional engagement with the formed head of a rivet under the same or similar conditions. In either case, the riveting block 22 is adapted for pcsitioning normal to the axis of the rivet so as to deliver riveting force in alignment with the rivet even though the air gun is not aligned with said rivet axis. The clapper-like mounting of the riveting block 22 is such "as to allow the percussion force developed in the conveying member I3 to be delivered to the rivet substantially as if the rivet gun were aligned with the rivet. In this manner, riveting under an overhanging channel, or other 'hard-to-get-at place, is readily accomplished by placing the riveting block 22 normal to the rivet with the gun angularly displaced therefrom as provided for by the cooperative arrangement of the bracket I8, peen member I6, and riveting block 22.

The inner peripheral area 32 of collar I8 is sumciently greater in diameter than the gun housing I 0, as best illustrated in Figure 2, so as to allow for considerable radial displacement between these parts which in turn allows for a wide range of movement of the gun nose I0 toward and away from the bracket midsection 3|. This loose-fitting arrangement between the bracket collar I9 and the gun nose Ill enables the gun to be swung over a relatively wide range of approach relative to the axis of the rivet work piece. The cooperative ball and socket and pivot mounting of the rivet block 22 relative to the peen member I3 and bracket It provided for sufiicient variable angular displacement of the tool to enable a workman to work up under" or over obstructions of varying dimensions as working conditions necessitate.

In the operation of my close-quarter peen, or adapter, to apply riveting force to a rivet in a hard-to-get-at location where the rivet gun cannot be aligned with the rivet the first step is to withdraw the conventional type of peen 4 from the gun. The adapter of this invention having been previously assembled with the balled peen I6 socketed in the riveting block 22 pivoted to the bracket I8 is inserted over the gun nose I 0 with collar I9 in encircled position relative thereto and the shank end I2 of the peen member I3 positioned in the bore II of the gun. The bracket I8 is then grasped by the operator in one hand with the other hand holding the gun by the piston grip portion (not shown). Engagement of the block 22 with the rivet 21 within the channel 28 is accomplished 'bypushing its end 24 forwardly relative the gun by pulling back on the bracket I8 while at the same time pushing the gun nose II] forwardly within the collar I9. Application of air under pressure will result in development of hammer action of member I5 which is conveyed to the riveting block 22 by the peen member I3. Retraction of the gun nose I0 relative to the collar I9 may be desired to reverse the angle of approach as determined by the type of obstruction to be circumnavigated.

Assembly .of the adapter with a conventional rivet gun and its operation is easily and quickly accomplished by the average operator as part of his regular riveting routine for there are no tools required tomake the change or any special riveting technique to learn.

While I have described my invention in detail in its preferred embodiment, it will be obvious to those skilled in the art after understanding my invention, that various changes, alterations, modifications, and substitutions can be made therein without departing from the spirit and scope of the claims.

I claim as my invention:

1. A tool for operation with a portable percussion-type rivet gun having an extended housing and a hammer member comprising a percussion member having a shank end adapted for insertion within the gun housing to engage the gun hammer, said percussion member being formed with a spherical free end, a bracket adapted for slidable mounting on the gun housing and having an end portion spaced from the spherical end of the percussion member, a riveting block having one end hinged to the end of the bracket with the other end in pivotal engagement with the free end of the percussion member and adapted to effect delivery of force from the rivet gun.

2. A rivet peening tool for use with a rivet gun having a cylindrical housing an a bore comprising a ball-ended peen adapted for insertion in said gun bore, a riveting member having a plane rivet engaging surface and a semispherical socket spaced inwardly therefrom for mutual cooperation with said ball of the peen to provide for movement therebetween, said riveting member being provided with a pivot point spaced from the socket, a securing means in engagement with the riveting member at said pivot point comprised of a bracket member including a sleeve adapted to loosely surround said housing for movement longitudinally of the gun to angularly displace said riveting member relative to the axis of the peen and thereby engage at right angles a rivet angularly displaced from the axis of said peen.

3. A rivet 'peening tool for attachment to a riveting means having a bore mounted hammer comprising a peen member having one end adapted for insertion in the gun bore to engage with said hammer, the other end of said peen being formed spherical, a rivet engagin member having a groove extending from one end thereof terminating as a pocket adjacent the opposite end to form a socket for said spherical end of the peen, a pivot point formed in said one end of the rivet engaging member, a spring means for holding the peen socketed in said pocket, a bracket slidably connected to the riveting means having one end pivotally connected to said pivot point of the rivet engaging member to effect angular displacement of said member relative to the peen upon longitudinal movement of the bracket relative to the riveting means.

4. A peening attachment for rivet guns havinga housing and a bore formed therein for receiving the shank of a rivetingpeen, said attachment comprising a sleeve adapted to loosely surround the housing, an arm rigidly connecting With said sleeve and adapted to project beyond the end of said housing and generally parallel to the axis thereof, a rivet engaging member swingably car- References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 790,015 Walsh May 16, 1905 1,783,403 Candee Dec. 2, 1930 2,311,041 Ferguson Feb. 16, 1943 1 144250 Ferguson June 29, 1948 

